day2：day1作业 字符编码

1,使用while循环输出1，2，3，4，5，6，8，9

# 使用while循环输出1，2，3，4，5，6，8，9
num = 1
while num <= 10:
    if num != 7:
        print (num )
    num += 1

num = 1
while num < 10:
    num +=1
    if num ==7:
        continue
    print(num)

num = 1
while num < 10:
    num +=1
    if num ==7:
        pass
    else:
        print(num)

2，输出0-100内所有奇数的和

#输出0-100内所有奇数

num = 1
sum = 0
while num <=100:
    if num%2 !=0:
        sum +=num
    num +=1
print(sum)

num = 1
sum = 0
while num <=100:
    sum +=num
    num +=2
print(sum)

3，print long messge 注意变量类型，个数要对应的上，不然会报错

"""

Version     : 0.1
Author      : Lisa
Date        : 2018/11/25 8:02 AM
Description : 

"""

msg ='''--------------info of lisa------------

name:lisa
age:22
job:developer
Hobbies:piano,yoga

------------------end-----------------------'''
print(msg)

--------------info of lisa------------

name:lisa
age:22
job:developer
Hobbies:piano,yoga

------------------end-----------------------

"""

Version     : 0.1
Author      : Lisa
Date        : 2018/11/25 8:02 AM
Description : 

"""
age = int(input("please input your age:"))
name =input("please input your name:")
height=int(input("please input you height:"))
msg="my name is %s, i am %d, my height is %d" %(name,age,height)
print(msg)

please input your age:22
please input your name:lisa
please input you height:165
my name is lisa, i am 22, my height is 165

4，如果字符串里面已经有了单引号的三引号，那么外面要用栓双引号的三引号，不然会报错

5，字符串里面打印%

sg="my name is %s, i am %d, my height is %d，学习进度3%" %(name,age,height)
print(msg)
注意观察，这样写的话， pycharm字符串会标黄，提示语法有问题

运行结果
please input your age:22
please input your name:lisa
please input you height:165
Traceback (most recent call last):
  File "/Users/guolixiao/PycharmProjects/lisa's_practise/boys/2.1.py", line 12, in <module>
    msg="my name is %s, i am %d, my height is %d，学习进度3%" %(name,age,height)
ValueError: incomplete format

正确写法，应用%来转义
msg="my name is %s, i am %d, my height is %d，学习进度3%%" %(name,age,height)
print(msg)

运行结果：
please input your age:22
please input your name:lisa
please input you height:165
my name is lisa, i am 22, my height is 165，学习进度3%

输出%d
msg="my name is %s, i am %d, my height is %d，学习进度3%%d" %(name,age,height)
print(msg)

运行结果：
my name is lucy, i am 22, my height is 167，学习进度3%d

6，while else，只要while循环不被break跳出，else部分就会被执行

7，电脑的传输还有储存实际上都是0101010这种的，电脑的成千上万的二极管等设备可以实现高地电平

8，美国发明了ASCII码，由于英文字符加符号很少，所以一开始就设计了7位 可以储存128个字符，发明者还是有先见的，多用了一个第8位以防字符不够用，但是虽然这样，还是明显不够用，ASCII码最左边一位永远是0，中文汉字有9万多个，美国为了解决全球化的文字问题，发明了一个万国码也就是Unicode，一开始给了中文两个字节，但是只可以储存65535个字，明显不够用，后来给了四字节，但是又太多了，会造成很多浪费，中文3个字节足以，所以后来有了一个升级版本的万国码就是UTF-8，使用3个字节储存中文，一个字节表示英文，两个字节其他，GBK是中国人发明的，用两个字节表示一个汉字，只在国内用。